diff --git a/6.x/e6.7/E67.java~ b/6.x/e6.7/E67.java~
deleted file mode 100644
index 99aaea5..0000000
--- a/6.x/e6.7/E67.java~
+++ /dev/null
@@ -1,25 +0,0 @@
-import java.util.Scanner;
-import java.util.Random;
-
-public class E67 {
-    public static void main(String[] args) {
-        Scanner in = new Scanner(System.in);
-        Random generator = new Random();
-        int i, j;
-        System.out.print("Inserisci una parola: ");
-        String word = in.next();
-
-        for(int k = 0; k < word.length(); k++) {
-            String first, middle, last;
-            i = generator.nextInt(word.length());
-            j = generator.nextInt(word.length() - i) + i;
-
-            first = word.substring(0, i);
-            middle = word.substring(i, j);
-            last = word.substring(j, word.length());
-
-            word = first + word.chatAt(j) + middle + word.charAt(i) + last;
-        }
-         System.out.println(first+middle+last);
-    }
-} 
diff --git a/InsOrd/Studente.java b/InsOrd/Studente.java
new file mode 100644
index 0000000..19b514f
--- /dev/null
+++ b/InsOrd/Studente.java
@@ -0,0 +1,24 @@
+public class Studente implements Comparable<Studente>{
+    private String nome;
+    private String cognome;
+    private double media;
+    private int eta;
+
+    public Studente(String nome, String cognome, double media, int eta) {
+        this.nome = nome;
+        this.cognome = cognome;
+        this.media = media;
+        this.eta = eta;
+    }
+
+    @Override
+    public int compareTo(Studente o) {
+        if(this.cognome.equals(o.cognome)) return this.nome.compareTo(o.nome);
+        return this.cognome.compareTo(o.cognome);
+    }
+
+    @Override
+    public String toString() {
+        return nome + " " + cognome + " media=" + media + " eta=" + eta;
+    }
+}
diff --git a/InsOrd/Studente.pdf b/InsOrd/Studente.pdf
new file mode 100644
index 0000000..b574467
Binary files /dev/null and b/InsOrd/Studente.pdf differ
diff --git a/InsOrd/Test.java b/InsOrd/Test.java
new file mode 100644
index 0000000..9c2ef28
--- /dev/null
+++ b/InsOrd/Test.java
@@ -0,0 +1,36 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class Test {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        ArrayList<Studente> lista = new ArrayList<>();
+
+        while(in.hasNextLine()) {
+            Studente s = new Studente(in.next(), in.next(), in.nextDouble(), in.nextInt());
+            insert(lista, s);
+        }
+
+        for (Studente s: lista) {
+            System.out.println(s.toString());
+        }
+    }
+
+    private static void insert(ArrayList<Studente> l, Studente s) {
+        if(l.size() == 0) {
+            l.add(s);
+        } else {
+            boolean ins = false;
+            for(int i = 0; i < l.size(); i++) {
+                if(s.compareTo(l.get(i)) < 0) {
+                    l.add(i, s);
+                    ins = true;
+                    break;
+                }
+            }
+            if(!ins) {
+                l.add(s);
+            }
+        }
+    }
+}
diff --git a/InsOrd/Test.pdf b/InsOrd/Test.pdf
new file mode 100644
index 0000000..f86ad72
Binary files /dev/null and b/InsOrd/Test.pdf differ
diff --git a/InsOrd/input.txt b/InsOrd/input.txt
new file mode 100644
index 0000000..d1cdba9
--- /dev/null
+++ b/InsOrd/input.txt
@@ -0,0 +1,6 @@
+AAA BBB 1 4
+BBB AAA 2 2
+CCC DDD 3 6
+ABC AAA 4 1
+BZZ AAA 5 3
+BBB CCC 6 5
\ No newline at end of file